MAX POWER
IMPORTANT: Always check and make sure that there is enough room to allow for
complete removal of the RETRACT unit, and room for the connection of the hydraulic
piping.
LOCATION OF THE AUXILIARY EQUIPMENT
The transmission lube oil tank and the hydraulic directional valve should be located
near the RETRACT unit, but in an accessible and dry place.
The hydraulic oil reservoir must be located above the water line, above and as near
to the pump as possible there must be no sharp elbows between the pump and the
oil tank.
The control panel (s) joystick (s), or foot switches are to be installed as required at
helm stations. The remote control box is to be installed in a convenient dry and well-
ventilated position.
INSTALLATION PROCEDURES
CONSTRUCTION OF THE MOUNTING BASE
The general method and materials used must be adapted to the particular hull
material (laminated wood, GRP, sandwich, aluminium, or steel). Naval Architects,
Classification Societies or engineering firms should be consulted.
The thruster’s mechanical stresses are spread over the hull by the mounting base
and the guide blocks. Installation, which should be executed by welding or bonding to
the hulls plating, normally reinforces the hull, the mounting base should be attached
to frames and stringers as well. The guide blocks should be replaceable should they
be found worn at a later date.
After the mounting base has been made, the RETRACT should be temporarily
secured on the flange to check its height its, centring, the accessibility of fittings
THRUST PLATES
Another important reason for this is to determine the exact location of the two thrust
plates.
These plates are to be fabricated by the installer from a suitable material.
The thrust plates distribute the thrust forces to the hull. They should be fixed to the
interior of the mounting base so that they will be directly in contact with the thrust
pads when the turbine is fully extended (See building plan).
GRP HULLS
: The mounting base may be moulded into the hull during construction
or prefabricated, and then laminated onto the hull later.
METAL HULLS
: The mounting base may be constructed with the hull or
prefabricated, and then welded onto the hull later.
- 5 INSTALLATION MANUAL RETRACT R 600
